Roof-greening sheet

ABSTRACT

Disclosed therein is a sheet for green roof that includes a copper or aluminum thin film or a nonwoven fabric having a predetermined thickness firmly laminated on both sides of a glass fabric having a predetermined area through an adhesive to prevent the root growth of plants and maximizes insulation from moisture, thermal insulation, and reduction of thermal conductivity, thereby extending the lifetimes of the sheet, the waterproof layer and the building structure.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a sheet installed not only to preventthe root growth of plants but also to provide a waterproof seal whenvegetating a building roof, and more particularly, to a sheet for greenroof including copper or aluminum thin films or nonwoven fabrics firmlylaminated on both sides of a glass fabric using an adhesive to eliminatemoisture and maximize thermal insulation in vegetating a building roof.

2. Background Art

As well known, green roofs involve growing plants on rooftops forproviding a vegetation environment in an urban area to minimize airpollutions and provide the urban area with beautiful views. To make thegreen roofs safe and stable, it is required to establish a “safefoundation” on the building structure where the green roofs are provided(that is, “planted”), as designed so that the vegetation does not affectthe structural stability and durability of the building.

The establishment of a safe foundation includes forming a waterprooflayer, which is the most fundamental base constructed on the rooftop ofthe building, and providing a root barrier material for protection ofthe waterproof layer against the green roof portion (e.g., plants,water, soil, manure, etc.). The primary reason of establishing the rootbarrier material is the growth control of the plant roots in vegetatingthe top of a building structure, where the roots may grow vigorouslypenetrating into the waterproof layer and into the building structurethat is made up of concrete, ending up with reduced lifetime of thebuilding structure.

To overcome this problem, a recent approach has been developed to form aroot barrier layer prior to construction of green roofs. For example, aroof barrier method involves providing a nonwoven fabric overlying thetop of a drainage plate to keep the drainage plate from being in directcontact with the waterproof layer. The nonwoven fabric is a regularpolyester nonwoven fabric or a performance-improved polymer nonwovenfabric applied on the drainage plate, only keeping the roots of plantsfrom penetrating into the water-storage space of the drainage platewithout deterioration of the drainage function of the drainage plate,thereby only controlling the root growth of the plants. The plant rootstend to penetrate into fine gaps and create a water path. But thenonwoven fabric takes on a form susceptible to penetration of thegrowing roots and thus cannot provide a good root barrier function.

For protection of the waterproof layer from penetration of plant roots,a PE film with stable chemical and physical properties may be adhesivelyapplied on the top of the waterproof layer to form a root barrier layerfor keeping the plant roots from growing into the waterproof layer. ThePE film has a joint portion to which an adhesive or an adhesive tape isapplied, so the joint portion becomes a main weak point ready to form awater path because of its poor adhesion stability, allowing thepenetration of plant roots and thus causing a deterioration of the rootbarrier function.

SUMMARY OF THE INVENTION

Accordingly, the present invention has been made to solve theabove-mentioned problems occurring in the prior arts, and it is anobject of the present invention to provide a sheet for green roof thatincludes a copper or aluminum thin film or a nonwoven fabric having apredetermined thickness firmly laminated on both sides of a glass fabrichaving a predetermined area through an adhesive to prevent the rootgrowth of plants and maximizes a moisture barrier function, thermalinsulation and reduction of thermal conductivity, thereby extending thelifetimes of the sheet, the waterproof layer and the building structure.

To accomplish the above object, according to the present invention,there is provided a sheet for green roof which is installed on the topof a waterproof layer to prevent the root growth of plants in vegetationof a green roof, the sheet for green roof including a glass fabrichaving a predetermined thickness and a predetermined area, and a copperfilm having the same area of the glass fabric and being integrallylaminated on both sides of the glass fabric using pressure.

In another aspect of the present invention, a copper film having thesame area of the glass fabric is laminated on the one side of the glassfabric, and an aluminum thin film having the same area of the glassfabric is laminated on the other side of the glass fabric usingpressure.

In still another aspect of the present invention, a copper film havingthe same area of the glass fabric is laminated on the one side of theglass fabric, and a nonwoven fabric having the same area of the glassfabric is integrally laminated on the other side of the glass fabricusing pressure.

As described above, the sheet for green roof according to the presentinvention that has a firm dual-composite laminate of a copper film andan aluminum thin film or a nonwoven fabric prevents the root growth ofplants during vegetation of the green roofs, removes the moisture,minimizes thermal conductivity, enhances thermal insulation, increasesthe lifetimes of the sheet and the building structure, increases theeconomy efficiency and workability to shorten the required constructiontime, and reduces the maintenance cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic exploded perspective of a first embodiment of thepresent invention.

FIG. 2 is an enlarged cross-section showing the first embodiment of thepresent invention.

FIG. 3 is an enlarged cross-section showing a second embodiment of thepresent invention.

FIG. 4 is an enlarged cross-section showing a third embodiment of thepresent invention.

FIG. 5 is an enlarged cross-section showing a fourth embodiment of thepresent invention.

FIG. 6 is an enlarged cross-section showing a fifth embodiment of thepresent invention.

FIG. 7 is an enlarged cross-section showing a sixth embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

According to the feature of the present invention, in a sheet for greenroof which is installed on the top of a waterproof layer to prevent theroot growth of plants in vegetation of a green roof, the sheet for greenroof includes a glass fabric having a predetermined thickness and apredetermined area, and a copper film having the same area of the glassfabric and being integrally laminated on both sides of the glass fabricusing pressure.

Reference will be now made in detail to the preferred embodiment of thepresent invention with reference to the attached drawings.

FIG. 1 is a schematic exploded perspective of a first embodiment of thepresent invention; and FIGS. 2 to 7 are enlarged cross-sections showingthe first to sixth embodiments of the present invention, respectively.

As illustrated in the figures, a sheet 100 for green roof according tothe present invention comprises a glass fabric 10, a copper film 20, analuminum thin film 30, a nonwoven fabric 40, and a PVC sheet 50.

The glass fabric 10, which features high-temperature durability,non-corrosiveness pertaining to resistance to chemicals, high tensilestrength, good thermal insulation, and low thermal conductivity, ispositioned at the center of the sheet 100 and provided as a corematerial having a predetermined area and a predetermined thickness. Thecopper film 20 is made from copper as a principal component into a thinfilm by rolling and provided in a predetermined area and a predeterminedthickness to make the copper component suppress the growth point of theprimary root, inhibiting the vertical growth of lateral roots. Thissecures the root barrier function and contributes to the stabilityagainst the growth of plants.

The aluminum thin film 30 is made from industrial aluminum into a thinfilm by rolling. Due to its excellence in heat conservation andinsulation, the aluminum thin film 30 is inserted into the ceiling orwalls of a building for the purpose of thermal insulation, or laminatedon a sheet as a means for reflecting light and heat. Hence, the aluminumthin film 30 is provided in a predetermined area and a predeterminedthickness to prevent a heat loss of the building structure.

The nonwoven fabric 40 is not made by weaving fibers but by arrangingfibers in parallel or at random and then bonding them together with asynthetic resin adhesive into a felt structure. The nonwoven fabric ismade from a polypropylene (PP) or polyethylene (PE) resin and providedin a predetermined area and a predetermined thickness.

The PVC (also called “polyvinyl chloride resin”) sheet 50 is made from ahomopolymer of vinyl chloride, or a copolymer containing at least 50%vinyl chloride, and provided in a predetermined area and a predeterminedthickness for the multi-purpose as a root barrier and waterproof seal toprotect the copper film 20 and provide a waterproofing function.

In a method of forming the sheet 100 using the aforementioned materials,as shown in FIGS. 1 and 2, an adhesive is applied on both sides of theglass fabric 10 having a predetermined thickness and a predeterminedarea, and then the copper film 20 having the same area of the glassfabric 10 is firmly laminated on both sides of the glass fabric 10 usingpressure to complete the three-layered sheet 100 for green root, whichprovides resistance to external shocks and hence a root barrierfunction.

In another aspect, as shown in FIG. 3, an adhesive is applied on bothsides of the glass fabric 10 having a predetermined thickness and apredetermined area, and then the copper film 20 having the same area ofthe glass fabric 10 is laminated on the one side of the glass fabric 10using pressure, while the aluminum thin film 30 having the same area ofthe glass fabric 10 is integrally laminated on the other side of theglass fabric 10 using pressure. The sheet 100 thus completed provides aroot barrier function, reduces heat conductivity, and enhances thermalinsulation.

In still another aspect, as shown in FIG. 4, an adhesive is applied onboth sides of the glass fabric 10 having a predetermined thickness and apredetermined area, and then the copper film 20 having the same area ofthe glass fabric 10 is laminated on the one side of the glass fabric 10using pressure, while the nonwoven fabric 40 having the same area of theglass fabric 10 is integrally laminated on the other side of the glassfabric 10 using pressure. The sheet 100 thus completed provides a rootbarrier function and eliminates moisture.

In still another aspect, as shown in FIG. 5, an adhesive is applied onboth sides of the glass fabric 10 having a predetermined thickness and apredetermined area, and then the aluminum thin film 30 having the samearea of the glass fabric 10 is firmly laminated on both sides of theglass fabric 10 using pressure. The sheet 100 thus completed isexcellent in thermal insulation.

In still another aspect, as shown in FIG. 6, an adhesive is applied onboth sides of the copper film 20 having a predetermined thickness and apredetermined area, and then the nonwoven fabric 40 having the same areaof the copper film 20 is laminated on the one side of the copper film 20using pressure, while the PVC sheet 50 having the same area of thecopper film 20 is integrally laminated on the other side of the copperfilm 20 using pressure. The sheet 100 thus completed provides a rootbarrier function and eliminates moisture.

In still further another aspect, as shown in FIG. 7, an adhesive isapplied on both sides of the PVC sheet 50 having a predeterminedthickness and a predetermined area, and then the copper film 20 havingthe same area of the PVC sheet 50 is laminated on the one side of thePVC sheet 50 using pressure, while the nonwoven fabric 40 having thesame area of the PVC sheet 50 is integrally laminated on the other sideof the PVC sheet 50 using pressure. The sheet 100 thus completedprovides a root barrier function and eliminates moisture.

To construct green roofs using the sheet 100, a water repellent withgood adhesiveness is applied in a predetermined thickness on the top ofthe waterproof layer of the green roof, and then a plurality of sheets100 cut out in a predetermined area are firmly bonded to the coating ofthe water repellent, where the consecutive connections between thesheets are combined together using a copper tape. Then, a soil layer isprovided on the top of the sheets 100, and a variety of plants such astrees or flowering plants are set into the soil layer to vegetate thegreen roofs.

The sheet for green roof according to the present invention thatincludes a dual laminate structure of a copper film, an aluminum thinfilm, or a nonwoven fabric can prevent the root growth of plants invegetation of green roofs, eliminate moisture, minimize thermalconductivity, and enhance thermal insulation to extend the lifetimes ofthe sheet and the building structure, with enhanced economy efficiencyand workability, and reduce the construction time and the maintenancecost, which secures the high industrial availability of the presentinvention.

1. A sheet for green roof, which is installed on the top of a waterprooflayer to prevent the root growth of plants in vegetation of a greenroof, the sheet for green roof comprising: a glass fabric having apredetermined thickness and a predetermined area and being coated withan adhesive on both sides thereof; and a copper film having the samearea of the glass fabric and being integrally laminated on both sides ofthe glass fabric using pressure.
 2. A sheet for green roof, which isinstalled on the top of a waterproof layer to prevent the root growth ofplants in vegetation of a green roof, the sheet for green roofcomprising: a glass fabric; a copper film having the same area of theglass fabric and being laminated on the one side of the glass fabric;and an aluminum thin film having the same area of the glass fabricantbeing integrally laminated on the other side of the glass fabric usingpressure.
 3. A sheet for green roof, which is installed on the top of awaterproof layer to prevent the root growth of plants in vegetation of agreen roof, the sheet for green roof comprising: a glass fabric; acopper film having the same area of the glass fabric and being laminatedon the one side of the glass fabric; and a nonwoven fabric having thesame area of the glass fabric and being integrally laminated on theother side of the glass fabric using pressure.
 4. A sheet for greenroof, which is installed on the top of a waterproof layer to prevent theroot growth of plants in vegetation of a green roof, the sheet for greenroof comprising: a glass fabric being coated with an adhesive on bothsides thereof; and an aluminum thin film having the same area of theglass fabric and being firmly laminated on both sides of the glassfabric using pressure.
 5. A sheet for green roof, which is installed onthe top of a waterproof layer to prevent the root growth of plants invegetation of a green roof, the sheet for green roof comprising: acopper film being coated with an adhesive on both sides thereof; and anonwoven fabric and a PVC sheet having the same area of the copper filmand being firmly laminated on both sides of the copper film usingpressure.
 6. A sheet for green roof, which is installed on the top of awaterproof layer to prevent the root growth of plants in vegetation of agreen roof, the sheet for green roof comprising: a PVC sheet beingcoated with an adhesive on both sides thereof; and a copper film and anonwoven fabric having the same area of the PVC sheet and beinglaminated on both sides of the PVC sheet using pressure.